31.Either you or on of your students________to attend the meeting that is due tomorrow.
In order to find the missing child, villagers __________ all they can over the past five hours.
During the last three decades, the number of people participating in physical fitness programs __________ sharply.
When I first met Bryan I didn't like him, but I __________ my mind.
—Oh no! We're too late. The train __________. —That's OK. We'll catch the next train to London.
—Have you heard about the recent election? —Sure, it __________ the only thing on the news for the last three days.